First off, check what you have set up in Utility/Dimensions/Linear/Text Style. Check the size of your text and whether "Text Scale" is on or off (if this is off, your text size will be the height in-scale of the text - ie. for text that measures 1/8"h when plotted for a 1/4"=1' drawing it would be set for 6"; if it is ON your text size will be the final plotted height you want, or 1/8" instead of 6").
You should also check through each of the settings that are in Text Style, Dim Style, Arrow Style and Auto Style. When you have everything set the way you like it, pick "Styles" and save it with a unique name so that you can load it into any other drawing!
I hope this helps!
Alan T. Hendry, RA
Intel i7-6700 (3.4GHz) Desktop, 32GB RAM, 3TB HD, Win 7 Pro 64-bit, DC 18 & 19 w/ latest beta update
Intel i7-4702 (2.2GHz) Laptop, 16GB RAM, 1TB HD, Win 10 Pro 64-Bit, DC 17, 18 and 19 w/ latest beta update